Open cluster
An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other.
Open Cluster
Related Category: Astronomy: General
see star cluster.
More on Open Cluster
Star Cluster - a group of stars near each other in space and resembling each other in certain characteristics that suggest a common origin for the group.
Open Cluster Celebration
Last week, we talked a little about open clusters, and got to examine two of them, the famous Double Cluster in Perseus.
Open clusters - NGC objects 4755, 265, 290 & 6231
Why Open Clusters are Important ...
An open cluster is characterized by the fact that the stars are not gravitationally bound. Although the stars in an open cluster are believed to have formed together, they will eventually separate due to the rotation of the Milky Way.
Open cluster
Wikipedia, the free encyclopedia - Cite This Source
An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other.
The Pleiades Open Cluster, M45.
Where in the galaxy would you typically expect to find open clusters like the Pleiades?
Beyond the New General Catalog there are dozens of other catalogues of deep sky objects - the Dolidze Dzimselejsvili (DoDz) open clusters catalogue is one of them.
OPEN CLUSTERS
Figure 17.23(a) shows a rather loose cluster"the Pleiades, or Seven Sisters"a well-known naked-eye object in the constellation Taurus.
Open Cluster NGC6939 in Cepheus
(RA 20h 31.4m , Dec. +60°38', 7.8 mag., 7 arcmin.) ...
open cluster Loosely bound collection of tens to hundreds of stars, a few parsecs across, generally found in the plane of the Milky Way.
open cluster
a system containing a few dozen to a few thousand stars that formed from the same stellar nursery
opposition ...
Open Cluster
(a) A small, loose cluster of stars that typically contains several hundred members. The best examples are the Hyades and the Pleiades, both in the constellation Taurus.
OPEN CLUSTER - Cluster of stars usually containing several 100 members packed into a region usually less than 20 light years in size. They are normally found near regions of star formation in the spiral arms of galaxies.
open cluster
A loose collection of hundreds of stars that are gravitationally bound to each other. Also known as a galactic cluster.
opposition
When a superior planet is directly opposite from the Sun in our sky, and is closest to the Earth.
Open Cluster
a collection of young stars that formed together. They may or may not be still bound by gravity. Some of the youngest open clusters are still embedded in the gas and dust from which they formed.
Open Cluster. A loose association of stars with no clearly defined shape. Often referred to as 'Galactic Clusters' since they are all found close to the galactic plane (of our galaxy).
open cluster: A cluster of 10 to 10,000 stars with an open, transparent appearance and stars not tightly grouped; usually relatively young and located in the disk of the galaxy.
Open cluster- a group of some few hundred stars bound by gravity and moving through space together ...
This open cluster in Cassiopeia was discovered by Mechain in 1781 and it was the last object Messier included in his Catalogue. It is located about 8,100 ly away and measures 15 ly across. It contains over 40 stars, including solitary red giant.
Open Cluster
Also known as a galactic cluster, an open cluster consists of numerous young stars that formed at the same time within a large cloud of interstellar dust and gas. Open clusters are located in the spiral arms or the disks of galaxies.
Open clusters are found in the disk of the Galaxy, and therefore lie largely in the plane of the Milky Way. Many of the closer ones, including those presented here, are easily visible to the naked eye (Messier 35 a fainter exception).
Open clusters: NGC 2516, NGC 3114, NGC 3293, NGC 3532, IC 2602, I 2714, Mel 105
Globular cluster NGC 2808
Planetary nebula NGC 2867
Diffuse nebula NGC 3372 (Eta Carinae Nebula)
Variable stars eta Car ...
Open Clusters are also called Galactic Clusters and contain about 1000 stars or so. There are probably around 20,000 open clusters in our galaxy, and most are found in the main body of the galaxy (the plane).
open cluster
Richer but fainter than NGC 6193 and requires a small telescope. Magnitude 7.1; diameter 12'; distance 3,600 light-years; R.A. 17h 21m, Dec. -49° 54'
NGC 6397 ...
Open clusters:NGC6709, NGC6755, NGC6749.
Globular cluster NGC6760 which has a 9.1 magnitude.
Planetary nebulae: NGC6778, NGC6741, NGC6772 ...
OPEN CLUSTER
An open cluster is a loose collection of up to about 1,000 relatively young stars that formed around the same time. An open cluster is about 10 parsecs across. Examples include the Pleiades and Hyades.
open cluster - (n.)
A galactic cluster, an asymmetric type of star cluster.
open universe - (n.) ...
5. Open Clusters versus Globular Clusters
Standard A: Science as Inquiry
Standard 1: Problem Solving ...
See open cluster. [H76]
Galactic Coordinates
A system of coordinates based on the mean plane of the Galaxy, which is inclined about 63° to the celestial equator.
The open cluster NGC 6530 is contained in the eastern part of the nebula. The young cluster (only several million years old) is nicely contrasted against the nebula.
The open cluster represents young stars, relatively recently formed, and these clusters are located in the disk of the Milky Way (the location of all our Galaxy's recent star formation). Open clusters typically have 100 to 1000 stars.
M36 (open cluster)
M37 (open cluster)
M38 (open cluster)
Auriga was protrayed as a charioteer who was seen carying two to three children on his arm. He was also known as Erechtheus, son of Hephaestus (Called Vulcan by the Romans).
M46 (open cluster)
M47 (open cluster)
M93 (open cluster)
Puppis was originally part of the large constellation Argo Navis.
A young open cluster, NGC 3293. (Courtesy of the Anglo-Australian Observatory/Royal Observatory Edinburgh)
(37K GIF)
Startrails at Anglo Australian Observatory. (Courtesy of the Anglo-Australian Observatory/Royal Observatory Edinburgh)
(73K GIF) ...
NGC 6939 is an open cluster about 2.5° south of [2330] theta Cephei. It is composed of about 80 stars. It lies in a very dense area, which is also home to NGC 6946, the Fireworks Galaxy.
1930 - Robert Trumpler uses open cluster observations to quantify the absorption of light by interstellar dust in the galactic plane; this absorption had plagued earlier models of the Milky Way, ...
of (6:55:18.7+25:22:32.5, ICRS 2000.0) of Constellation Gemini, the Twins -- west of Mebsuta (Epsilon Geminorum), northeast of Mu (Teja) and Eta (Propus) Geminorum, northwest of Zeta (Mekbuta) and Delta (Wasat) Geminorum, and east of open cluster M35.
The end result of all this star formation is the creation of a cluster of stars called an open cluster or galactic cluster. Examples of such clusters include the Hyades and the Pleiades clusters.
Their luminosity functions often resemble the power law seen for open clusters in nearby galaxies, rather than the Gaussian forms for globular clusters.
Meanwhile, the seemingly open cluster NGC 6791 in Lyra has some of the traits of an older globular cluster.
Melotte 111 is is a large, open cluster of stars ranging between 5th magnitude (barely visible) to 10th magnitude, 100 times fainter.
The Ursa Major Group is a set of 220 stars that share a common motion through space and were once formed as members of an open cluster, which has since become gravitationally unbound.
The Pleiades also known as M45 or the Seven Sisters, is the name of an open cluster in the constellation of Taurus. It is among the nearest to the Earth of all open clusters, probably the best known and certainly the most striking to the naked eye.
A typical open cluster is about 20 parsecs or less in diameter. The stars in an open cluster will gradually move apart from each other with time. It is estimated that there are 20,000 open clusters within our galaxy.
The Jewel Box - NGC 4755 (also known as Kappa Crucis) is an open cluster of about 100 stars in the Southern Cross (a constellation in the Southern Hemisphere).
The Pleiades is one of the nearest open clusters to the earth. The cluster probably contains a few hundred stars. The brightest stars of the cluster nine spectral type B giants, concentrated in an area about 7 ly in diameter.
What open clusters can be seen with the naked eye?
How many open clusters are there?
How fast do stars in clusters move?
What is a star cluster?
Wmat makes up the atmosphere on Mars?
Who was Cleomedes?
What made Cleomedes famous?
At the center of the crab's shell is a huge open cluster, the Beehive cluster, also known as Praesepe (M44). The open cluster M67 is nearby. The brightest star in Cancer is Acubens (meaning claw); the second-brightest is Al Tarf (meaning tip).
For example, stars in the Milky Way can group together into open clusters or globular clusters. Galaxies also group together into cluster of galaxies, and the clusters of galaxies group together into superclusters of galaxies.
Associations have 10-100 stars (e.g., OB, T Tauri). have 105-106 , 75 in diameter. Open clusters have 100-1000 , 10-100 in diameter.
, , ...
There are some exceptions however; for example most of the bright stars of the Big Dipper travel together forming an open cluster.
In particular, by plotting a HR diagram for either a globular or open cluster of stars, astronomers can estimate the age of the cluster from where stars appear to turnoff the main sequence (see the entry on main sequence for how this works).
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397. Spiral Tracers
Objects used to map the spiral arms (e.g. O and B associations, open clusters, clouds of ionized hydrogen, and some types of variable stars).
Clusters generally are groups of stars, sometimes groups of other astronomical objects. These stellar clusters vary in size and placement in the galaxy - the two major types that can be distinguished are open clusters and globular clusters.
Population I star orbits are orderly: roughly circular orbits close to the mid-plane of the galactic disk. Young star clusters made of Population I stars are called open clusters because the stars are loosely bound together, in contrast to the old, ...
Look for the constellation just to the west of Leo. Within Cancer can be found M44, also known as the Beehive Cluster, or the Praesepe. This is an open cluster of stars, that under a dark sky looks like a small, fuzzy cloud.
obliquity the angle of tilt of a planet's axis of rotation open cluster a collection of young stars that formed together; they may or may not be still gravitationally bound; ...
 See also: Open, Cluster, Star, Sky, Constellation
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